Slack-provider for perforating-machines.



' n 0 734,651. PATENTEDJUEY 2a, 1903.

W. AGKERMAN.

SLACK PROVIDER FOR PERFORATING MACHINES. Arrnmulonnnnn mm. 5. 1902.

110 MODEL.

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strip of paper from a roll to the feed mechoperation of the automatic machine which is contact-pins will not close the circuits necesperiphery of a roll-of large diameter than he. 734,65l.

UNITE STATES Patented July as, 1903.

PATENT Fries.

wIL iAM oKERMAN, on NEW YORK, N. Y., ASSIGNOR TO THE UNITED STATES GRAPHOTYPE COMPANY, TION OF NEW YORK.

OF NEW YORK, N. Y., A CORPORA- SLACK PROVIDER FOR PERFORATING-MACHINES SPECIFICATION formingpart of Letters Patent N 0. 734,651, dated July 28, 1903:.

Application filed December 5, 1902.

To all whom it mag concern:

Be it known that I, WILLIAM ACKERMAN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Slack-Providers for Perforating-Machines, of which the following is a specification.

This invention relates to a mechanism which is designed for feeding a continuous anism of a machine for perforating the strip. It is absolutely necessary for the accurate to be actuated by'the perforations in the strip that the perforations be made in the correct positions and in exact relation with each other. Toaccomplish this, the strip must be fed regularly and evenly to the punching mechanism of the perforating-machine. If the strip is fed too fast or if there) is a dragandthe paper is not fed fast enough to the perforating-machine, the spaces between the perforations willvary and be irregular, and when the strip is put into the automaticmachine, whether it be for casting type or transmitting messages, the proper sary to produce the correct characters. Rolls of paper coming from the manufacturer are at other times. When they are rolled tightly, there is more of a strain upon the feed mechanism than when they are rolled loosely, and when there is a strain upon the feedmechanism there is a liability that shorter lengths of the paper will be fed than when there is no strain upon the feed mechanism. There is also a different strainon the feedmeoham ism when the strip is being pulled from the when the strip is being pulled from the periphery of the roll that has been reduced andis'small in diameter. This afifects the feed of the paper to a perforating-machine and results in irregularly-punched perforations, and these cause the machine which is actuated by the perforations to operate inaccurately.

The object of this invention is to produce Serial No. 133,973- (No model.)

a simple, easily-handled, and closely-adjustable slack-provider--that is, a mechanism which will act synchronously with and pass the strip of paper from the roll to the feed mechanism of the perforating-machine regularly and evenly, so that the tension will always be the same, and consequently the exact amount ofpaper will be fed at each interval to the punches and the perforations made in the proper positions and at the correct distances from each other to cause the I accurate operation of the machine with which the perforated strip is to be used. This objectis attained by providing a standard with A friction device is attached to the fork to prevent the roll of paper from running ahead and unwinding too fast, and an adjustable tension device is provided for regulating the pressure of the feed-rolls upon the paper.

Figure 1 of the accompanying drawings is a side elevation of a slack-provider that embodies the invention. Fig. 2 is a rear elevation of the same, and Fig. 3 is a detail view showing the paperroll friction device on larger scale. s

The supporting-base 1, the standards 2, rising from the base, and the arms 3 of the fork projecting from the standard are preferably cast integral of iron. In the upper ends of the arms are slots 4 for receiving the ends of the spindle 5 of the bobbin 6, upon'which the strip of paperis wound. On one side the bob- ;bin has a flange 7 and on the other side has a finger 8. The roll of paper is held on the bobbin between the flange and the finger.

To prevent the roll from turning ahead and unwinding too rapidly when the strip of paper is pulled by the feed-rolls, a pin 9 is caused to impinge against the flange on the end of the bobbin by a spring 10 in the hub 11, that projects from the side of the upper end of one arm. The tension of this spring is adjusted by means of the screw-threaded sleeve 12, that to o turns in the threaded end of the .hub. A clamp-nut 13 is provided for holding the sleeve in position after it has been turned to obtain the desired tension for the spring.

The feed-rolls 14: and 15 are mounted on arbors that are held by the arms of the fork. The arbor 16 of the lower roll at one end has agear 17, that meshes with a gear 18 on the arbor 19 of the upper roll. The ends of the arbor 19 of the upper roll extend through slots in the arms of the fork and are engaged byyokes 20 on the ends of spindles 21, which are pressed down by springs 22, that'thrust between nuts 23 on the spindles and lugs 24, projecting from the arms of the fork. By turning the nuts the tension of the springs may be adjusted, so that the pressure of the upper roll against the lower roll may be closely regulated. On the upper end of each of these spindles is a head 25, and pivoted to the end of each lug and adapted to engage the head of a spindle is a lever 26. When these levers are turned down, the spindles are raised, so as to relieve the pressure of the upper roll against the lower roll. When the levers are thrown up, the spindles are forced down by the springs, so that the upper roll bears against the lower roll with the desired yielding pressure.

On one end of the arbor 16 of the lower roll is a ratchet 27. Engaging with the teeth of this ratchet is a pawl 28, that is pivoted to the side of one of the arms of the fork. Engaging with the teeth of this ratchet there is also apawl29, that is mounted on a lever 30, which is free to oscillate on the arbor 16 of the lower roll. The end of this lever opposite the pawl is connected by a link 31 with the end of an armature-lever 32, that is "pivoted to an arm 33, which projects forwardly from the upperend of the standard. The armature-lever carries the armature 34 of the two magnets 35, the coils of which are adapted to be connected, preferably in parallel, with the wires of the circuit which operates the feed of the perforating-machine with which this slack-provider is to be used. A spring 36 normally lifts the armature-lever and holds the armature away from the magnet-cores. A screw 37, held by the arm 33, is arranged to engage the top of the armature and limit the upward movement of the armature-lever, and a screw 38 is arranged to engage the bottom of the armature and limit the downward movement of the lever. By these means the feeding movementof this lever can be adjusted to a nicety.

An-i-nsulating-block 39 is secured to the standard for supporting the binding-posts 40, to which the circuit-wires are connected. The binding-posts are connected with resistance-coils 41, which are connected with the coils of the feed-magnets.

With this slack-provider a strip of paper may be fed from a large or small roll wound tightly or loosely, so that there will be no tension on the paper when it passes into the feed of the perforating-machine with which this slack-provider is designed to be used. All of the parts are adjustable, so that the feed of the paper by this slack-provider may exactly equal the feed of the perforatingmachine.

I claim as my invention 1. A slack-provider having a standard adapted to support a roll of paper, feed-rolls supported by the standard and geared together,a ratchet-and-pawl mechanism adapted to intermittently rotate one of the feedrolls, and a magnet arranged to actuate the pawl and adapted to be connected with the feed-circuit of a perforating-machine, substantially as specified.

2. A slack provider having a standard adapted to support a roll of paper, a friction device adapted to retard the rotation of the roll of paper, feed-rolls supported by the standard and geared together, a ratchet-andpawl mechanism adapted to intermittently rotate one of the feed-rolls, and a magnet arranged to actuate the pawl and adapted to be connected with the feed-circuit of a perforating-machine, substantially as specified.

3. A slack-provider having a standard adapted to support a roll of paper, feed-rolls supported by the standard and geared together, a tension device for regulating the pressure of one feed-roll against the other, a ratchet-and-pawl mechanism adapted to intermittently rotate one of the feed-rolls, and a magnet arranged to actuate the pawl and adapted to be connected with the feed-circuit of a perforating-machine, substantially as specified.

4. A slackprovider having a standard adapted to support a roll of paper, feed-rolls supported by the standard and geared together, an adjustable tension device adapted to regulate the pressure of one feed roll against the other, a relief device for relieving the pressure of one roll from the other, a ratchet-and-pawl mechanism adapted to intermittently rotate one of the rolls, and a magnet arranged to actuate the pawl and adapted to be connected with the feed-circuit of a perforating-machine, substantially as specified.

5. A slack provider having a standard with a fork adapted to removably support a bobbin, an adjustable friction device adapted to control the movement of the bobbin, feed-rolls supported in the fork and geared together, an adjustable tension device for regulating the pressure of one feedroll against the other, a ratchet connected with an arbor of one feed-roll, a pawl engaging the ratchet, and a magnet arranged to actuate the pawl and adapted to be connected with the feed-circuit of a perforating-machine, substantially as specified.

6. A slack-provider having a standard, a fork projecting upwardly from the standard, openings in the upper ends of the fork adapted to receive the arbor of a paper-bob- IIO bin, an adjustable friction device held by the standard and adapted to engage thebobable means for determining the movement 10 a bin for controlling its movement, feed-rolls of the magnet-armature, binding-posts segeared together and held in the fork, an adcured to the standard and resistance-coils justable tensiondevice adapted to regulate fastened to the standard, substantially as 5 the pressure of one roll against the other, a specified.

device for lifting one roll from the other, a WILLIAM ACKERMAN. ratchet secured to the arbor of one roll, a

I WVitnesses:

pawl engaging the ratchet, amagnet adapted ETHEL M. LOWE, to intermittently actuate the pawl, adjust- H. R. WILLIAMS. 

